<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<script>
    //变量的大小写
    var a = 10;
    console.log(a);

    //函数的大小写
    function foo() {
        console.log("你好")
    }
    foo();


    //关键字的大小写
    if (a>=10){
        alert('嗯，a是大于等10的')
    }

    var i = 10
    var f = 10
    var ifff = 10
    var forr = 9;

</script>
<input type="button" onclick="alert('点到了')" value="点我">
<INPUT type="button" ONCLICK="alert('点到了-_-')" value="点我">
</body>
</html>